Republican nominee Donald Trump's odds are at 16% for the presidency, down 9 percentage points from Monday, according to the market. His odds have been falling since the end of the Republican National Convention, when he was at 40%.

CNN's Political Prediction Market is an online game administered by the company Pivit, which functions like an online market and allows Internet users to predict the outcome of the election. It is not to be confused with polls from real voters.

Clinton experienced a bump in poll numbers after the Democratic National Convention; in a CNN/ORC poll released Monday, Clinton leads Trump by 9 percentage points, 52% to 43%, in a head-to-head matchup.

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Trump received a bump following his party's convention, but a week of controversies, including his reluctance to endorse House Speaker Paul Ryan or Sen. John McCain, as well as his public feuding with the family of a slain Muslim US soldier, have led to a drop in his odds in the Political Prediction Market.